TABLE 2.

The table shows the values of test‐retest reliability (Pearson's r) and practice effect (paired t‐tests) of scores of single tasks and global score after the administration of GEMS‐A followed by a second administration of GEMS‐A (GEMS A‐A) compared with the administration of GEMS‐A followed by the administration of GEMS‐B (GEMS A‐B)

	Test‐retest reliability(Pearson's r)		Mean difference(Retest minus)		Practice effect(paired t‐test)
GEMS tasks and total score	GEMSA‐A	GEMSA‐B	GEMSA‐A	GEMSA‐B	GEMSA‐A (df = 51)	GEMSA‐B (df = 58)
Orientation	1	–0.069	+0.15	+0.48	t = 2.06, p = .044	t = 3.35, p = .001
Immediate Memory	0.600	0.625	+0.46	+0.25	t = 3.91, p < .001	t = 1.40, p = .168
Months Backwards	0.392	0.493	+0.09	+0.07	t = 0.87, p = .389	t = −0.38, p = .709
Puzzle	0.160	0.516	–0.01	+0.12	t = −0.15, p = .877	t = 0.42, p = .678
Clock	0.775	0.573	–0.12	+0.11	t = −0.63, p = .532	t = −0.44, p = .659
Delayed Memory	0.741	0.709	+0.04	+0.43	t = 0.26, p = .792	t = 1.67, p = .101
Naming	0.544	0.249	+0.25	+0.38	t = 2.09, p = .041	t = 2.26, p = .028
Verbal Comprehension	0.035	1	0	0	t = 0, p = 1	t = 0, p = 1
Visual Attention	0.484	0.146	–0.13	–0.09	t = −1.22, p = .226	t = −0.49, p = .623
Fluency	0.766	0.585	+1.46	–0.07	t = +3.45, p < .001	t = −0.32, p = .749
Metaphor	0.485	0.296	+0.52	–0.16	t = +1.77, p = .083	t = −0.37, p = .709
GEMS total	0.845	0.774	+2.4	+1.16	t = −3.33, p = .001	t = 1.42, p = .162